The book has been prepared in the field of animal physiology in general and in particular the human body. Followed in this book simplified method for Physiology and members with a full explanation supported graphic planning and graphic illustrations and photographs. The book is in chapter thirteen. Talked about the basic functional unit in living organisms and then the cardiovascular Turning to the immune system Allimfawi and then discussed the digestion and absorption, breathing and urinary tract Turning to the latest chapter reproductive tract.